Cabinet for sound producing apparatus



Nov. 5, 1963 F. H. KLUG Filed Sept. 11, 1959 2 Sheets-Sheet 1 2/ ,7 I Z i= I x :;;;i1; l4 /6 i 14 q L Q a INVENTOR.

ATTORNEY.

Nov. 5, 1963 F. H. KLUG 3,109,509

CABINET FOR SOUND PRODUCING APPARATUS Filed Sept. 11, 1959 2 sheets -sheet 2 J /5 /7 l7 27:17: .7. Ll I; I/ T INVENTOR.

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United States Patent M 7 3,109,509 CAhINET FGR SUUND PRGDUCING APPARATUS Ferdinand H. King, 40% Empire, Benton Harbor, Mich.

Filed Sept. 11, 1959, Ser. No. 839,342 4 Claims. (Cl. 18131) This invention relates to sound producing apparatus of the cabinet type. The principal objects of this invention are:

First, to provide a cabinet for a sound producing apparatus which greatly amplifies the volume and at the same time accurately reproduces the sounds.

Second, to provide a structure having these advantages which does not require any adjustment or manipulation on the part of the user.

Third, to provide a cabinet having these advantages which is adapted to receive reproducing instruments of various types.

Further objects relating to the invention will appear from the description to follow. The invention is defined and pointed out in the claims. A preferred embodiment of the invention is illustrated in the accompanying drawing, in which:

FIG. 1 is a fragmentary view mainly in vertical section on a line corresponding to line 11 of FIG. 3.

FIG. 2 is a fragmentary view in horizontal section on a line corresponding to line 22 of FIG. 1.

FIG. 3 is a horizontal section on line 33 of FIG. 1.

FIG. 4 is a fragmentary vertical section on a line corresponding to line 4-4 of FIG. 1.

In the accompanying drawing 1 represents a sound reproducing apparatus, which is conventionally illustrated. It will be understood that the cabinet of my invention may be varied in size according to the size of the apparatus 1 it is designed to receive.

In the preferred embodiment of my invention illustrated the cabinet is formed of sheet metal. for connecting the walls and top and bottom are not iliustrated, but they are desirably welded together. The cabinet comprises a bottom 2, top 3, disposed in parallel relation, a rear wall 4, a front wall 5, and side walls 6. The instrument supporting base member designated generaily by the numeral 7 comprises the bar-like members 8 disposed in parallel relation and connected by the cross pieces 9 spaced from the ends thereof. The base members 3 are provided with down turned ends 10 which con-' stitute supporting feet engaging the bottom 2 adjacent the side walls 6 and desirably cushioned thereto at 11 so there is no relative vibration at that point. The legs'12 are desirably of resilient material.

The uprights 13 are mounted on the base cross members d centrally thereof and in the embodiment illustrated are spaced to receive the instrument 1. At their upper end the uprights 13 have laterally projecting portions 14 to which the cross bar 15 is secured as by means of the bolts 16. This bar is substantially spaced from the top 3 of the cabinet to the inner side on which the cross bar 17 is fixedly secured as by means of the spot welds 18. This cross bar 17 is provided with a plurality of parallel transversely disposed hanger arms 19 to which the sound amplifying plates 2%) are supportedly connected by means of the coil springs 21. These plates are desirably of sheet metal stock; they are of uniform thickness and substantially laterally spaced and, in the embodiment illustrated, are disposed in transverse relation to the cabinet wall having opening 22 therein. This wall is illustrated as being pro vided with a screen closure for the opening therein as is common practice in sound producing instrument cabinets.

The plates 20 are connected by the anchoring springs 23 to the cross piece 15. These springs 21 and 23 are under such tension as 'to support the plates 20 in their The means I 3,109,509 Patented Nov. 5, 1963 laterally spaced relations to each other while permitting the vibratory movement thereof as the result of sound waves to which they are subjected, and they coact with the walls in accurately reproducing the recorded tones as well as amplifying them.

If desired the unit, that is, the cabinet as illustrated, can be placed in an ornamented wood cabinet. The steel walls of the cabinet and the steel plates inside act as a sounding board rather than purely as a cabinet, and the tones are reproduced not only in increased volume but substantially as given'to the reproducer. While the cabinet with the metal Walls is the most desirable structure so 'far as producing volume is concerned, the tone modifying plates 26 may be incorporated in a cabinet having walls of other material-wood or plastic, for example-with desirable results. In the embodiment illustrated the sound producing means 1 is conventionally illustrated as being of the speaker type but it should be understood that my inventionv is desirable for embodiment in various forms of sound producing apparatus of the cabinet type.

I have not illustrated an instrument control panel or instrument switches or controls as they form no part of my present invention.

I have illustrated and described my invention in an embodiment thereof which is highly desirable. I have not attempted to illustrate or describe other embodiments or adaptations as it is believed that this disclosure will enable those skilled in the art to embody or adapt my invention as may be desired.

Having thus described the invention what is claimed as new and desired to secure by Letters Patent is:

1. A cabinet for sound producing apparatus comprising top, bottom, front, rear and side walls of sheet metal fixedly connected at their adjacent edges to constitute a unitary structure, the front wall having an opening in the upper portion thereof, an instrument support comprising a base member having restricted foot portions supportedly engaging the bottom adjacent opposed Walls of the cabinet, uprights on said base member disposed in inwardly spaced relation to the walls, a cross bar mounted on said uprights in spaced relation to the top wall, a hanger bar mounted on the under side of the top wall in vertically spaced relation to said cross bar on said uprights and having a plurality of spaced parallel hanger arms thereon, a plurality of sheet metal plates disposed in laterally spaced parallel relation between said hanger arms and said cross bar, spaced coil hanger springs for said plates connected to said hanger arms and anchoring springs connecting said plates to said cross bar, and a sound producing instrument mounted on said base member below said cross bar, said springs being of such tension as to maintain said plates in their laterally spaced relation while permitting sound wave vibration thereof. I

2. A cabinet for sound producing apparatus comprising top, bottom, front, rear and side walls of sheet metal fixedly connected at their adjacent edges to constitute a unitary structure, the front wall having an opening in the upper portion thereof, an instrument support comprising a base member disposed Within the cabinet, uprights on said base member disposed in inwardly spaced relation to the walls, an anchor bar mounted on said uprights in spaced relation to the top wall, a hanger disposed in vertically spaced relation to said cross bar on said uprights, a plur ality of sheet metal plates disposed in laterally spaced parallel relation between said hanger and said anchor bar, hanger springs for said plates connected to said hanger, and anchoring springs connecting said plates to said anchor b-ar, said springs being of such tension as to maintain said plates in their laterally spaced relation while permitting sound wave vibration thereof.

3. In combination, a cabinet for sound producing apparatus comprising walls of sheet stock, an instrument support comprising a base member, uprights on said base member projecting upwardly therefrom in inwardly spaced relation to the walls of the cabinet, a cross bar mounted onsaid uprights in downwardly spaced relation to the top of the walls, a hanger bar disposed in vertically spaced relation to said cross bar and having a plurality of spaced cross arms thereon, a plurality of plates disposed in laterally spaced relation between said hanger bar arms and said cross bar, coiled hanger springs for said plates connected to said hanger bar cross arms, and anchoring springs connecting said plates to said cross bar, said hanger and anchoring springs being under such tension as to maintain the plates in their vertically spaced relation while permitting sound wave vibration thereof.

4. In combination, a cabinet for sound producing apparatus, an instrument support comprising a base member, uprights on said base member projecting upwardly therefrom in inwardly spaced relation to the walls of the cabinet, an anchor member mounted on said uprights in downwardly spaced relation to the top of the walls, a

hanger member disposed in vertically spaced relation to said anchor member, a plurality of vibratory plates disposed in laterally spaced relation between said hanger members and said anchor member, hanger springs for said plates connected to said hanger member, and anchoring springs connecting said plates to said anchor member, said anchoring springs being under such tension as to maintain the plates in their venticmly spaced relation while permitting sound Wave vibration thereof.

References Cited in the tile of this patent UNITED STATES PATENTS 239,473 En gert Mar. 29, 1881. V

688,893 Springer 2 Dec. 17, 190 1 2,476,572 Wenzel July 19, 1949 2,777,902 Goldmark Jan;15, 1957 2,811,215 Rudd et a1 Oct. 29, 1957 2,835,334 McDonald May 20, 1958 2,973,824 Pinski Mar. 7, 1961 2,986,228

Rettinger *et a1 May 30, 1961 

1. A CABINET FOR SOUND PRODUCING APPARATUS COMPRISING TOP, BOTTOM, FRONT, REAR AND SIDE WALLS OF SHEET METAL FIXEDLY CONNECTED AT THEIR ADJACENT EDGES TO CONSTITUTE A UNITARY STRUCTURE, THE FRONT WALL HAVING AN OPENING IN THE UPPER PORTION THEREOF, AN INSTRUMENT SUPPORT COMPRISING A BASE MEMBER HAVING RESTRICTED FOOT PORTIONS SUPPORTEDLY ENGAGING THE BOTTOM ADJACENT OPPOSED WALLS OF THE CABINET, UPRIGHTS ON SAID BASE MEMBER DISPOSED IN INWARDLY SPACED RELATION TO THE WALLS, A CROSS BAR MOUNTED ON SAID UPRIGHTS IN SPACED RELATION TO THE TOP WALL, A HANGER BAR MOUNTED ON THE UNDER SIDE OF THE TOP WALL IN VERTICALLY SPACED RELATION TO SAID CROSS BAR ON SAID UPRIGHTS AND HAVING A PLURALITY OF SPACED PARALLEL HANGER ARMS THEREON, A PLURALITY OF SHEET METAL PLATES DISPOSED IN LATERALLY SPACED PARALLEL RELATION BETWEEN SAID HANGER ARMS AND SAID CROSS BAR, SPACED COIL HANGER SPRINGS FOR SAID PLATES CONNECTED TO SAID HANGER ARMS AND ANCHORING SPRINGS CONNECTING SAID PLATES TO SAID CROSS BAR, AND A SOUND PRODUCING INSTRUMENT MOUNTED ON SAID BASE MEMBER BELOW SAID CROSS BAR, SAID SPRINGS BEING OF SUCH TENSION AS TO MAINTAIN SAID PLATES IN THEIR LATERALLY SPACED RELATION WHILE PERMITTING SOUND WAVE VIBRATION THEREOF. 